>I have found statements like:
>
> ? myVariable = ""
>
>to consistently produce unreliable results
>.
>
>I now use with confidence.
>
> ? ISBLANK(myVariable) = .T. / EMPTY(myVariable) = .T.

You don't need the "= .T." part.

ISBLANK(myVariable)

or

EMPTY(myVariable)

can be used without the comparison, like:

IF EMPTY(myVariable)
  * do something
ENDIF

Tamar